Automatically recreate the thumbnail after lossless crop

Bugs and Suggestions in XnView Classic which have been resolved

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Dreamer
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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Sat Nov 07, 2009 6:05 pm

marsh wrote:It works fine here. Some kind of read ahead/cache behind issue?
I don't think so, I tried to rebuild thumbs, restart xnview...
marsh wrote:---edit--
Doh! Dreamer's example confirmed with write>jpg 'rebuild thumb' setting on or off.
It's a lossless operation, so that option shouldn't be important.
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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Sat Nov 07, 2009 6:08 pm

xnview wrote:Could you send me jpeg sample?
And 'rebuild EXIF thumbnail' works?
OK, no problem, but it's all JPEG pictures...

If you mean 'Recreate EXIF thumbnail' in menu > edit > metadata, then yes, it works good, always. Context menu "Rebuild thumbnails" in browser doesn't work.
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Re: Automatically recreate the thumbnail after lossless crop

Post by marsh » Sat Nov 07, 2009 8:36 pm

Dreamer wrote:
marsh wrote:---edit--
Doh! Dreamer's example confirmed with write>jpg 'rebuild thumb' setting on or off.
It's a lossless operation, so that option shouldn't be important.
How else to preserve original thumbnail?

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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Sat Nov 07, 2009 9:03 pm

marsh wrote:How else to preserve original thumbnail?
When using lossless operations, then it should be always preserved IMO. That option is only for lossy operations.
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Re: Automatically recreate the thumbnail after lossless crop

Post by xnview » Mon Nov 09, 2009 12:54 pm

Dreamer wrote:
marsh wrote:How else to preserve original thumbnail?
When using lossless operations, then it should be always preserved IMO. That option is only for lossy operations.
Will be fixed in B3
Pierre.

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Re: Automatically recreate the thumbnail after lossless crop

Post by GeorgD » Tue Nov 10, 2009 12:06 pm

Dreamer wrote:
marsh wrote:How else to preserve original thumbnail?
When using lossless operations, then it should be always preserved IMO. That option is only for lossy operations.
Sorry guys, I've to check back as I guess there's a misunderstanding. Do you really want to keep the original thumbnail even if lossless crop removes 95% of the image, so it is massively lossy but just does not re-encode the image data?? IMHO, the thumb is a small preview of the image, and if the image is changed (newly re-coded image data / lossy or not does not matter) I want the thumb to be updated so it shows the new state of the image. Elsewise I would not be able to distinguish several images in browser mode that are derived from one single image e.g. by cropping differently.

I fully agree that lossless operations like metadata editing / creating (=image is not changed) is no need for thumb re-creation.

Kind regards, Georg
In the XnView Wiki, you can improve the user guide / documentation / F1-help for XnView (classic/Windows) and for XnViewMP

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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Wed Nov 11, 2009 1:40 am

GeorgD wrote:Sorry guys, I've to check back as I guess there's a misunderstanding.
I am sorry, yes, it was a misunderstanding. I wanted to say the "thumbnail should be always retained (not removed) when using lossless operations", but it should be changed, of course. I wanted to say, that option is only for lossy operations, not lossless.
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Re: Automatically recreate the thumbnail after lossless crop

Post by GeorgD » Wed Nov 11, 2009 6:28 pm

Dreamer wrote:I wanted to say, that option is only for lossy operations, not lossless.
OK, now it's clear 8)
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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Sat Nov 14, 2009 7:16 pm

Fixed in beta 3, thanks, Pierre!

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